Tetraselmis chui Phytoplankton CultureProduct Overview Tetraselmis chui is the large, robust green flagellate that delivers size, energy, and versatility to your reef feeding program. These 8 12 micron four flagellated cells represent one of the largest single celled phytoplankton species available to aquarists, making them ideal for feeding large polyp corals, mature copepod populations, and substantial filter feeders like clams and sea cucumbers. The distinctive quadra flagellar